package com.qbgs.util;

import javax.servlet.http.HttpServletRequest;

/**
 * 
 * 获取客户端IP地址
 * @author lyh
 * @version 2012-6-18
 * @see IpAddrUtil
 * @since
 */
public class IpAddrUtil
{
    
    /**
     * 
     * Description: 获取客户端IP地址<br>
     * 
     * @param request
     * @return 
     * @see
     */
    public static String getIpAddr(HttpServletRequest request)
    {

        String ip = request.getHeader("x-forwarded-for");

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
        {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
        {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
        {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

}
